Why is rendering slow?

Mehmet-Src wrote on 7/26/2025, 8:07 AM

Windows 11 Pro for Workstations

AMD Ryzen Threadripper PRO 7995WX 96-Cores 2.50 GHz
RTX 5090 x 2 GPU
256 GB Ram

vegas 21

1- Why does rendering use 2 percent of the CPU?

2- Why do video thumbnails disappear from the timeline?

3- Why does rendering continue intermittently? I'm having the same problems even when rendering a simple audio file. Why?

4- I bought all this equipment so I could do things quickly. What's wrong? What am I doing wrong?

 

Comments

relaxvideo wrote on 7/26/2025, 8:21 AM

5- Why not tell your source and rendering format exactly?

#1 Ryzen 5-1600, 16GB DDR4, Nvidia 1660 Super, M2-SSD, Acer freesync monitor

#2 i7-2600, 32GB, Nvidia 1660Ti, SSD for system, M2-SSD for work, 2x4TB hdd, LG 3D monitor +3DTV +3D projectors

Win10 x64, Vegas22 latest

Dexcon wrote on 7/26/2025, 8:21 AM

Please provide information as requested in https://www.vegascreativesoftware.info/us/forum/important-information-required-to-help-you--110457/

... especially which build of Vegas Pro 21 are you using? And what media are you using? - a MediaInfo report would be most helpful (the free app is linked to in C-1 in the above link).

Vegas Pro 21 has not been available to purchase from MAGIX for nearly one year - have your problems only appeared recently? If yes, has something changed on your computer in recent days that may have possibly caused a change in the behaviour in Vegas Pro 21?

Last changed by Dexcon on 7/26/2025, 8:26 AM, changed a total of 1 times.

Cameras: Sony FDR-AX100E; GoPro Hero 11 Black Creator Edition

Installed: Vegas Pro 15, 16, 17, 18, 19, 20, 21 & 22, HitFilm Pro 2021.3, DaVinci Resolve Studio 20, BCC 2025, Mocha Pro 2025.0, NBFX TotalFX 7, Neat NR, DVD Architect 6.0, MAGIX Travel Maps, Sound Forge Pro 16, SpectraLayers Pro 11, iZotope RX11 Advanced and many other iZ plugins, Vegasaur 4.0

Windows 11

Dell Alienware Aurora 11:

10th Gen Intel i9 10900KF - 10 cores (20 threads) - 3.7 to 5.3 GHz

NVIDIA GeForce RTX 2080 SUPER 8GB GDDR6 - liquid cooled

64GB RAM - Dual Channel HyperX FURY DDR4 XMP at 3200MHz

C drive: 2TB Samsung 990 PCIe 4.0 NVMe M.2 PCIe SSD

D: drive: 4TB Samsung 870 SATA SSD (used for media for editing current projects)

E: drive: 2TB Samsung 870 SATA SSD

F: drive: 6TB WD 7200 rpm Black HDD 3.5"

Dell Ultrasharp 32" 4K Color Calibrated Monitor

 

LAPTOP:

Dell Inspiron 5310 EVO 13.3"

i5-11320H CPU

C Drive: 1TB Corsair Gen4 NVMe M.2 2230 SSD (upgraded from the original 500 GB SSD)

Monitor is 2560 x 1600 @ 60 Hz

RogerS wrote on 7/26/2025, 8:29 AM

Do you get normal results for one of the benchmarks in my signature?

As far as I'm aware VEGAS doesn't support the 10-bit 422 decoding the 5090 is capable of. Are you using such formats? I also think using two GPUs may not help or may cause issues (consider disabling one temporarily for testing purposes).